Linear Relationship - A Four Metre Ladder Leans - Science and Maths Assignment Help

Assignment Task:

Task:

Revision for class test
1. Given the linear relationship − −= 15 3 30 x y , determine if point (-3,5) lies on the line.
2. A four metre ladder leans against a wall and makes an angle of 71o with the ground. How far up the wall does the ladder reach? (round to 3 significant figures)

3. A, B and C are three towns on a map. Town A is on a bearing of 300o T from town C. Town

C is North East of town B. The bearing of town B from town A is 210o T.

Find the true bearing of:
a) C from B

b) A from B

c) C from A

4. It costs a publishing company $45,000 to buy the machinery needed to make books. This is a fixed cost that cannot change. The cost for the paper and ink needed to make one book is $1 and the advertising cost is $4 for each book sold. If the selling price is $9 per book and x is the number of books made (and sold), then answer the following questions showing all your workings.
(i) What is the cost of producing and selling the x books and the revenue made from selling the x books?
(iii) How many books should they sell to break even?

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